While I see a host of flaws in the swings of younger ballplayers, I tend to see one (or more) of five flaws in the swings of the college, MiLB, and MLB hitters who contact me because they have stopped hitting...

Leaky Hands are a very common problem that results from the -- too often problematic -- ways higher-level hitters are taught to shorten their swings.

Problems with the Top Hand are the next most common problems in higher-level hitters. They tend to occur for two reasons. First, most hitters' top hands are connected to their dominant arm, which is used to doing most of the work. Second, a number of widely-used cues will tend to create problems with the top hand.

Pull Disconnection is a grown-up version of Bat Drag that in my experience, and because of muscle memory, is nearly 100% fatal. Want a reason to understand why Bat Drag happens, how to prevent it, or how to fix your hitter's problem with it? Pull Disconnection is it.

Swing Plane Problems usually result from ill-informed efforts to shorten the swing.

A True Loop can result from an attempt to eliminate a phony loop or a misunderstanding of how good hitters approach the ball and a misunderstanding of the swings of Ted Williams, Stan Musial, Barry Bonds.